Patent US3783960A successfully refreshed from Google Patents.
US3783960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer maneuvering jack
Assignee: Individual
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Filing: 1972-01-10
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Granted: 1974-01-08
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Expires: 1992-01-10
Abstract
Abstract A self-contained conveyance or maneuvering device for mounting to the tongue platform of a trailer or the like which has a jack column and a ground-engaging wheel at the lower end thereof which can be vertically raised or lowered by power. The jack column is also rotatably power driven in either direction so as to direction orient the wheel. The wheel is reversibly power driven to move the platform and trailer. The vertical and rotational movement of the jack is accomplished by a single drive source which drives a tranmission which in turn is connected, respectively, to the drives for vertically translating the jack column, and for rotating it. The directions of movement and power applications are determined by a control circuit and control switches, the switches for controlling wheel direction and wheel reversible rotation being located in a hand control unit at the end of a length of electrical cable.
Inventors
- 👤 J Feliz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/24; B60D1/246; B60D1/58; B60D1/66; B60S; B60S9/00; B60S9/14; B60S9/205; B60S9/21; B60S9/215
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
In a maneuvering device mounted to the tongue bar of a trailer or the like, a combination of: a. a movable jack column supported by said bar and adapted to be rotated and vertically translated with respect to said bar; b. a ground-engaging wheel mounted to the lower end of said jack column; c. a first driven means operatively connected to said column for translating the same; d. a second driven means operatively connEcted to said column for rotating the same; e. drive means; f. a transmission having an imput connected to said drive means and an output connected, restively, to each of said driven means; g. control means interconnecting said drive means and said transmission for selectively and reversibly driving each of said driven means; h. a platform connected to said bar and elevated therefrom to provide room for said wheel to be retracted.
Claim 2
Dependent Claim
145 words
In a maneuvering device mounted to the tongue bar of a trailer or the like, a combination of: a. a movable jack column supported by said bar and adapted to be rotated and vertically translated with respect to said bar; b. a ground-engaging wheel mounted to the lower end of said jack column; c. a first driven means operatively connected to said column for translating the same; d. a second driven means operatively connEcted to said column for rotating the same; e. drive means; f. a transmission having an imput connected to said drive means and an output connected, restively, to each of said driven means; g. control means interconnecting said drive means and said transmission for selectively and reversibly driving each of said driven means; h. a platform connected to said bar and elevated therefrom to provide room for said wheel to be retracted.
Claim 3
Dependent Claim
181 words
In a maneuvering device mounted to the tongue bar of a trailer or the like, a combination of: a. a movable jack column supported by said bar and adapted to be rotated and vertically translated with respect to said bar; b. a ground-engaging wheel mounted to the lower end of said jack column; c. a first driven means operatively connected to said column for translating the same; d. a second driven means operatively connected to said column for rotating the same; e. drive means; f. a transmission having an imput connected to said drive means and an output connected, respectively, to each of said driven means; g. control means interconnecting said drive means and said transmission for selectively and reversibly driving each of said driven means; h. a second jack column connected to said bar positioned stationary relative to said movable jack column, said stationary column being tubular and having a generally circular cross sectional geometry wherein said movable column is tubular having a generally square cross sectional geometry, said movable column being disposed within the interior of said stationary column.
Claim 4
Dependent Claim
181 words
In a maneuvering device mounted to the tongue bar of a trailer or the like, a combination of: a. a movable jack column supported by said bar and adapted to be rotated and vertically translated with respect to said bar; b. a ground-engaging wheel mounted to the lower end of said jack column; c. a first driven means operatively connected to said column for translating the same; d. a second driven means operatively connected to said column for rotating the same; e. drive means; f. a transmission having an imput connected to said drive means and an output connected, respectively, to each of said driven means; g. control means interconnecting said drive means and said transmission for selectively and reversibly driving each of said driven means; h. a second jack column connected to said bar positioned stationary relative to said movable jack column, said stationary column being tubular and having a generally circular cross sectional geometry wherein said movable column is tubular having a generally square cross sectional geometry, said movable column being disposed within the interior of said stationary column.
Claim 5
Dependent Claim
105 words
A device as claimed in claim 2 including: a pair of lugs connected to said movable column and movable therewith; a first switch mounted to operatively engage said lugs whereby translational movement of said movable column may be limited; another lug mounted to said second driven means; a second switch mounted to operatively engage said other lug whereby rotational movement of said movable column may be limited; a platform connected to said bar and elevated therefrom to provide room for said wheel to be retracted; and wherein said second driven means includes a gear having a central square shaped aperature to receive said movable column.
Claim 6
Dependent Claim
26 words
A device as claimed in claim 2 wherein said second driven means includes a gear having a central square shaped aperture to receive said movable column.
References Cited (Backward Citations)
US2036153A
Cited
US2356172A
Cited
US2439764A
Cited
FR896592A
Cited
US3288435A
Cited
US3566986A
Cited
US3458173A
Cited
US3648539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |